Pollen indication to source plants in the eastern desert of China

doi:10.1360/04wd0170

	Pollen indication to source plants in the eastern desert of China
	Li, YC ; Xu, QH ; Zhao, YK ; Yang, XL ; Xiao, JL ; Chen, H ; Lu, XM
刊名	CHINESE SCIENCE BULLETIN
	2005-08-01
卷号	50 期号:15 页码:1632-1641
关键词	Eastern Desert Of China Pollen Indication Association Indices (a) Over-representation Indices (o) Under-representation Indices (u) Correlation Coefficients (Cc) Similarity Coefficients (c) Detrended Correspondence Analysis (Dca) Cluster Analysis (Cla) Ratios Of Nitraria And Ephedra (N/e) Ratios Of Ephedra And Artemisia (E/a) Ratios Of Artemisia And Chenopodiaceae (A/c)
ISSN号	1001-6538
DOI	10.1360/04wd0170
文献子类	Article
英文摘要	In order to investigate the indication of major pollen types to source plants, 39 surface pollen samples are collected from 39 plant communities. The results show that diversity of pollen assemblages presents in different communities. Chenopodiaceae pollen percentages are highest in Kalidium communities and Ceratoides communities (higher than 45%, average is 63.4%), but high Ephedra pollen percentages (higher than 3.3%, average is 16.5%)in Ceratoides communities make it distinguished from Kalidium communities. Artemisia pollen percentages (more than 50%) are much higher than Chenopodiaceae (less than 35%) in Artemisia Communities. Nitraria pollen percentages (higher than 2%, average is 13.6%) are highest in Nitraria communities compared with those in other community patterns. Tamariceae pollen percentages (higher than 2%, average is 8.6%) are highest both in Tetraena and Reaumuria communities compared with those in other community patterns. But in Reaumuria communities, Artemisia pollen percentages are higher than Chenopodiaceae with some other pollen types such as Gramineae, Compositae, Leguminosae; on the contrary, in Tetraena communities, Artemisia pollen percentages are less than Chenopodiaceae with few other pollen types. Calligonum pollen only appears in Calligonum communities (higher than 2%, average is 5%). The results of cluster analysis (CLA) and detrended correspondence analysis (DCA) show that the pollen indication to source plants can be reflected by association indices (A), over-representation indices (O), under-representation indices (U), R-value, the average pollen percentages where parent plants are absent (X-a) and the average pollen percentages where parent plants are present (X-P). Zygophyllum, Calligonum, Tetraena, Tribulus and Tamariceae can indicate source plants very well, owing to high A scores. Artemisia, Chenopodiaceae and Gramineae have high R-values, and Nitraria, Cruciferae and sedum have high O scores, so they are over-represented types, but the higher X-P and the lower X-a values make that these pollen types can also indicate source plants moderately. Allium, Leguminosae, Roseceae, Pedicularis and Compositae have low A scores (less than 0.5), high O and/or U scores, so they cannot indicate source plants clearly. Some other pollen types, such as Pinus, Picea, Betula, Quercus, Ulmus, Ephedra, Elaegnaceae, Ranunculaceae, Caryophyllaceae, Polygonaceae, Saxifragaceae, only appear in pollen assemblages, so their indication cannot be decided. Just like the pollen percentage ratios of Artemisia and Chenopodiaceae (A/C), the ratios of Ephedra and Artemisia (E/A), Nitraria and Ephedra (N/E) can also indicate the aridity of environment. In typical desert communities, A/C ratios are less than 0.5, E/A ratios are more than 0.1, and N/E ratios are less than 1. In steppe desert, A/C ratios are 0.5 - 2, E/A ratios are less than 0.1, and N/E ratios are more than 1.
WOS关键词	SOURCE AREA ; FOREST COMPOSITION ; INNER-MONGOLIA ; SURFACE POLLEN ; VEGETATION ; REPRESENTATION ; CALIBRATION ; ASSEMBLAGES ; FREQUENCIES ; USA
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000232609500018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65704]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, QH
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Hebei Normal Univ, Coll Resources & Environm, Shijiazhuang 050016, Peoples R China 3.Univ Cent Lancashire, Dept Environm Management, Preston PR1 2HE, Lancs, England 4.Hebei Acad Sci, Hebei Geog Inst, Shijiazhuang 050011, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, YC,Xu, QH,Zhao, YK,et al. Pollen indication to source plants in the eastern desert of China[J]. CHINESE SCIENCE BULLETIN,2005,50(15):1632-1641.
APA	Li, YC.,Xu, QH.,Zhao, YK.,Yang, XL.,Xiao, JL.,...&Lu, XM.(2005).Pollen indication to source plants in the eastern desert of China.CHINESE SCIENCE BULLETIN,50(15),1632-1641.
MLA	Li, YC,et al."Pollen indication to source plants in the eastern desert of China".CHINESE SCIENCE BULLETIN 50.15(2005):1632-1641.